See 21 Iconic Photos of the Vietnam War

It has been 40 years since the spring day when the last U.S. helicopters lifted up and, shortly after, the North Vietnamese army entered Saigon, deciding a conflict that had raged for years. News photographs from the time showed the world what was going on, from a country full of death in all its gruesome forms to peaceful protests across the ocean. Despite their age, those images have not lost their impact.